classic worker: never try to save the results in ddfs in the python client
worker: delete the code about saving the results of the last stage into ddfs
test_save: Use the documented save_results option instead of save
Merge pull request #585 from pooya/classic_save

Classic save
This closes issue #584
tests: add a couple of tests for ddfs gc

These tests push something to ddfs, run the gc and make sure that the blobs are
available after the gc.
Merge pull request #587 from pooya/test_gc

tests: add a couple of tests for ddfs gc
:: add basic sandstorm integration
add a hack to run the slave without ssh